I have a swinglok full form die for my McSavage that i built a few years ago. I could never get it to work right so ended up using sabots. I just finished a 12 ga NEF conversion (.458) and I'd like to try full form in this one but I hate to buy another FF die. Is there a way to get the barrel drop out of the die? I've got 6 inches of barrel left from the NEF conversion to make a new drop from so I can try FF.